|Tupolev I-4 (ANT-5)|
1928 to 1934
|Number of pieces:||
The Tupolew I-4 ( Russian Туполев И-4 ), also known as ANT-5 (АНТ-5), was a single-engine, single - seat, one-and-a- half - decker . It was developed in the second half of the 1920s and was used as a fighter by the Soviet Air Force until 1938 .
Two prototypes were built, the first with a Jupiter VI engine, the second with a Jupiter IV engine, both from the French manufacturer Gnôme-Rhône . The model's maiden flight took place in July 1927, and after state testing had ended, it was decided in December of the same year to put the aircraft into series production. Before this began on October 25, 1928, some changes were made to the tail unit. In the course of production, the Jupiter engine was switched to the Soviet license version M-22 .
Series production ended in 1934 after 371 machines. They were used in the fighter squadrons and after 1938 in the training units.
A few special versions were tested, for example the I-4bis in 1931 without the lower wing and with slats on the upper wing. The I-4 used in 1929 for the Sweno piggyback project was shortened by 0.5 m on each side of the lower wing. Another aircraft experimented with a machine gun mounted on the upper wing, some machines received two recoilless 7.62 cm DRP / APK cannons from Leonid Wassiljewitsch Kurtschewski mounted on the upper wing.
In 1932 an I-4 was used for the first time to test 82 mm rocket projectiles developed by the Gasdynamisches Laboratorium (GDL) . After the GDL merged with the Rocket Research Institute (RNII), the experiments were continued in 1935; the Katyusha bullets emerged from them .
A planned float version I-4P was abandoned in 1931.
The I-4 was constructed entirely of metal, the cladding was made of corrugated dural sheet. The two-part upper wing had three spars, was mounted on a brace frame and attached to the fuselage with two strut straps and to the extremely short lower wing with two V-handles. The profile thickness was 16% for the struts and 12% at the ends. The rigid landing gear had a continuous axle and a tail spur.
|span||Upper wing 11.40 m
lower wing 5.70 m
|Wing area||Upper wing 19.80 m²
Lower wing 4.0 m²
|Preparation mass||978 kg|
|Takeoff mass||1430 kg|
|drive||a 9-cylinder radial engine M-22|
|power||353 kW (480 hp)|
|Top speed||220 km / h near the ground,
231 km / h at 5000 m altitude
|Rise time||14.3 min at 5000 m altitude|
|Summit height||7000 m|
|Flight duration||3.3 h|
|Duration of a full curve||12.1 s|
|Armament||two 7.62mm MG PW-1
four 50kg bombs
- Vadim B. Schawrow : On the history of Soviet aircraft construction. Aircraft constructions in the years of socialist industrialization (1) . In: Flyer calendar of the GDR 1979 . Military Publishing House , Berlin 1978, p. 176-178 .
- Wilfried Copenhagen : Soviet fighters . Transpress, Berlin 1985.
- Karl-Heinz Eyermann : The aviation of the USSR 1917-1977 . Transpress, Berlin 1977.
- Peter Stache: Fighter planes by A. N. Tupolew part 1 . In: Flieger Revue . No. 1 , 1970.
- Peter Stache: Fighter planes by A. N. Tupolew part 2 . In: Flieger Revue . No. 2 , 1970.